Or the CIA. US Intelligence is amateurish enough to be engaged in such activities. Talk about keystone spooks, check their Nordstream fiasco.
It’s possible the CIA was responsible but it’s highly unlikely in my opinion, despite the criticism the US has some of the best cyber warriors in the world on par with any country in the world.
The Nord Stream issue is a totally different topic, I’m speaking specifically about a cyber information war being carried out thru hackers, etc.